This New York Times bestselling chapter book series has been keeping readers engaged and laughing for more than a decade with over one million copies sold! Clementine has been picked for Friend of the Week, which means she gets to be line leader, collect the milk money, and feed the fish. Even better, she'll get a Friend of the Week booklet, in which all the other third-grade kids will write why they like her. Clementine's best friend Margaret has all sorts of crazy ideas for how Clementine can prove to the class she is a good friend. Clementine has to get a great booklet, so she does everything Margaret says she should do. But what begins as one of the best weeks ever starts turning into the worst, and being a good friend might turn out harder than Clementine thinks.